PA Consulting Group (formerly Personnel Administration) is a professional services firm that works with public, private and third-sector organisations. It was founded in 1943 by Ernest E. Butten, Tom H. Kirkham and Dr David Seymour, who used a new approach to people management to increase productivity in munitions factories during World War 2. PA grew to become the world’s largest management consultancy by headcount in 1970. Today, PA employs more than 4,000 people globally.
https://en.wikipedia.org/wiki/PA_Consulting_Group